CN2289921Y

CN2289921Y - Low frection-resistance slowly stop shock ball check valve

Info

Publication number: CN2289921Y
Application number: CN 96233518
Authority: CN
Inventors: 权竹山; 陈德亮; 陈永齐; 杨四云
Original assignee: CHONGQING VALVE FACTORY
Current assignee: CHONGQING VALVE FACTORY
Priority date: 1996-08-01
Filing date: 1996-08-01
Publication date: 1998-09-02
Anticipated expiration: 2006-08-01

Abstract

The utility model is composed of a valve cover 3, a valve body 4 and a valve seat 6. One end of the tapered cylindrical valve body 4 is provided with a damping oil cylinder 1, and a rotary shaft 13 of a rocker arm is connected with a moving blade 10 of the damping oil cylinder 1, a compensating counterweight 2, rocker arm 14 of a valve clack and a semicircular valve clack 5. The end surface of the valve seat 6 is provided with a circular groove which is provided with an O-shaped rubber sealing ring 7. The valve clack can be steadily started, closed and operated, and the life time of can be enhanced more than four times. The utility model has double sealing effect and has the advantages that the utility model is suitable for the high-pressure and the low-pressure work conveying in a pipe line, the utility model effectively expels barrier and dirt and conveys medium in a reverse direction, etc. The utility model is widely used for the equipment for gathering engineering of crude oil, water and other fluid medium.

Description

Low frictional resistance Slow Close shock-decreasing type ball check valve

The utility model is a kind of ball check valve, particularly relates to low frictional resistance Slow Close shock-decreasing type ball check valve.

Exist at existing known rotary-open type or Lift check valve: medium transport in can only be to pipeline, prevent the effect of flowing backwards, and can't satisfy the regularly logical ball (or other wiper) of crude oil long-distance transport pipes needs, with to carrying out de-sludging and row barrier cleaning in the pipeline, thus the requirement of conveying capacity in the holding tube line; Can't carry out the reverse conveying of medium; It is not steady that the flap of safety check opens and closes job run, easily produces water hammer, sealing pair is hit or vibrates, and the damage sealing surface causes sealability unreliable." the hammer safety check disappears " is to have increased torsion spring and damper on the general check valve structure in the patent disclosure of number of patent application 88207963.8, and its deficiency still can not be to effectively taking out stains in the pipeline and reverse shortcoming such as fed sheet of a media.

The purpose of this utility model is to overcome the prior art above shortcomings, and a kind of compact structure is provided, make the steady keying of flap of safety check and running job, valve seat have reliable sealing performance, and can be to carrying out de-sludging and the cleaning of row's barrier in the pipeline, and the low frictional resistance Slow Close shock-decreasing type ball check valve of rhetorical question fed sheet of a media.

Above-mentioned purpose of the present utility model is to realize by such structure, form by valve gap, valve body, valve seat, cylinder valve one end device at the band tapering has damping oil cylinder; rocker shaft is connected with counterweight with the moving vane of damping oil cylinder; and drive flap rocking arm and semicircle flap; and the valve seat end face has circular Baltimore groove, is mounted with O shape rubber seal, seals with flap.

Working principle of the present utility model is as follows: be mounted with the moving vane of motionless stator blade, activity in the cylinder body of damping oil cylinder and be full of oil and form, at stator blade two holes are arranged, the moving vane that drives damping oil cylinder under the rocker shaft effect makes oil pass back into two holes of stator blade, forms damping flap is is steadily opened and closed and running job; O type rubber ring is installed on the sealing surface of valve seat and flap, has formed of the double seal of O shape rubber seal, guaranteed when high pressure conditions or low-pressure state, all can keep reliable sealing performance metal (soft seal) and metal to metal (hard sealing); Adopt the cylinder valve of band tapering, after being opened, flap can enter epicoeloma fully, the holding tube line passage is unimpeded, thereby satisfy the regularly logical ball (or other wiper) of crude oil long-distance transport pipes, with to carrying out de-sludging and row barrier cleaning in the pipeline, thereby the requirement of the logical conveying capacity of holding tube can reduce the surface friction drag that pipeline medium is carried, realize low frictional resistance, can realize reverse fed sheet of a media ability simultaneously.

The utility model said structure can further specify by accompanying drawing.

Fig. 1 is a structure cross-sectional schematic of the present utility model;

Fig. 2 is the damping oil cylinder cross-sectional schematic.

Among the figure: 1-damping oil cylinder 2-counterweight 3-valve gap 4-valve body 5-flap 6-valve seat 7-O shape rubber seal 8-throttle valve 9-stator blade 10-moving vane 11-locating column 12-cylinder body 13-rocker shaft 14-flap rocking arm 15-aperture.

As shown in Figure 1, cylinder valve 4 one end devices of band tapering have damping oil cylinder 1, and rocker shaft 13 connects the moving vane 10 and the balance bell 2 of damping oil cylinder 1, and drive flap rocking arm 14 and flap 5, and valve seat 6 end faces have Baltimore groove to settle O shape rubber seal 7.

For in the pipeline oppositely during fed sheet of a media, make flap 5 be in full open, enter epicoeloma, can not fall and close, be mounted with locating column 11 at valve gap 3.

At Fig. 2, the housing of damping oil cylinder is a cylinder body 12, is made up of moving vane 10 and stator blade in the cylinder body 12.

For flap 5 is is steadily opened and closed and running job, at stator blade 9 throttle valve 8 is housed, regulate 9 two aperture 15 diameters of stator blade, promptly regulate oily flow size, reflect the size of damping.

The utility model compared with prior art adopts damping structure to realize that flap can steadily open and close and transport The row operation is than the Service life of old-fashioned check-valves more than four times; That double sealing structure can adapt to is high in the pipeline, Pumped (conveying) medium under the low-pressure state; Effectively to carrying out the cleaning of de-sludging and troubleshooting in the pipeline, reach and oppositely carry Jie The characteristics such as matter.

The utility model is widely used in crude oil, product oil, water, reaches the gathering engineering of other fluid media (medium) Device therefor.

Claims

1. one kind low frictional resistance Slow Close shock-decreasing type ball check valve, form by valve gap 3, valve body 4, valve seat 6, it is characterized in that damping oil cylinder 1 being arranged; rocker shaft 13 is connected with counterweight 2 with the moving vane 10 of damping oil cylinder 1 with cylinder valve 4 one end devices of tapering; and connect flap rocking arm 14 and semicircle flap 5; at valve seat 6 end faces circular Baltimore groove is arranged, be mounted with 0 shape rubber seal 7.

2. low frictional resistance Slow Close shock-decreasing type ball check valve according to claim 1 is characterized in that valve gap 3 is mounted with locating column 11.

3. low frictional resistance Slow Close shock-decreasing type ball check valve according to claim 1, the housing that it is characterized in that damping oil cylinder 1 is a cylinder body 12, is made up of moving vane 10 and stator blade 9 in the cylinder body 12.

4. low frictional resistance Slow Close shock-decreasing type ball check valve according to claim 3 is characterized in that 9 liang of apertures 15 of stator blade, is regulated by throttle valve 8.